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stat990 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/990.png | The forestry department needs to analyze the survival rate of a certain type of sapling transplantation. It recorded the survival conditions of these saplings after transplantation and compiled the following table:
| Number of Saplings | 2000 | 4000 | 6000 | 8000 | 10000 | 12000 |
|---------------------|------|------|------|------|-------|-------|
| Survived Saplings | 1862 | 3487 | 5343 | 7234 | 9103 | 12752 |
| Survival Rate | 0.931 | 0.8718 | 0.8905 | 0.9043 | 0.9103 | 0.9109 |
Based on the table information, the estimated survival probability of this sapling transplantation is ________ (accurate to 0.001). | 0.911 | NULL | free_form |
stat991 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/991.png | Stephen Curry is a professional basketball player in the United States, playing as a point guard for the NBA's Golden State Warriors. The table below shows Curry's free throw training records over a certain period:
Total free throws: 400, 1000, 1600, 2000, 2887
Successful throws: 348, 893, 1432, 1786, 2617
Free throw success rates: 0.87, 0.893, 0.895, 0.893, 0.906
Based on the above data, it can be estimated that the probability of Curry making a successful free throw is ______ (accurate to 0.1). | 0.9 | NULL | free_form |
stat992 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/992.png | Xiao Qiang's family wants to purchase a set of commercial housing. His father obtained the following information through media:
| Location | Area/m² | Price/10,000 yuan | Distance to Xiao Qiang's school/km |
| A | 82 | 106.6 | 0.5 |
| B | 67 | 73.7 | 2.2 |
| C | 104 | 83.2 | 1.5 |
| D | 84 | 75.6 | 0.8 |
Knowing that Xiao Qiang's family requires the housing area to be between [66m²–90m²], considering the housing price and the distance to Xiao Qiang's school, Xiao Qiang's family should first choose ____________. | D | NULL | free_form |
stat993 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/993.png | Strengthening labor education is an important measure for schools to implement the policy of "five educations in tandem." A small interest group of four students at a certain school conducted surveys to understand the average weekly labor time of their fellow students. The results are shown in the table below:
Surveyor: Wang Xue, Du Juan, Yue Ming, Wang Jing
Sample Size: 10, 15, 20, 100
Average Weekly Labor Time (hours): 3, 2, 1.5, 4
Among these four students, the survey results of _______ are more reliable. | Wang Jing | NULL | free_form |
stat994 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/994.png | A bank needs to hire a lobby manager. Applicant Wang Lin's scores for three indicators are shown in the table below. If weights of 2:3:5 are assigned from left to right, her final score is ______ points. | 83 | NULL | free_form |
stat995 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/995.png | The weight compliance of 45 students in a certain class (unit: persons) is shown in the table below. If a student is randomly selected from this class, what is the probability that their weight meets the standard? | 4/5 | NULL | free_form |
stat996 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/996.png | In order to understand the water usage of residents in a community, a random sample of water usage from 10 households was taken. The results are as follows:
Water usage/month (tons) |10|13|14|17|18|
Number of households |3 |1 |3 |2 |1 |
What is the median water usage of these 10 households? | 14 tons | NULL | free_form |
stat997 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/997.png | A school conducted a survey on the weekly extracurricular reading time of some students and presented the results in the following statistical table. What is the frequency of students whose weekly extracurricular reading time is no more than 2 hours? | 17/50 | NULL | free_form |
stat998 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/998.png | "Green hills are more valuable than gold and silver mountains." In our district, to promote all-area tourism highlighting its unique features, a large-scale tree planting activity was carried out in various towns during Arbor Day on March 12 this year. The forestry department recorded the survival rate of planted seedlings two months later, as shown in the table below:
Planted bare trees (m) 200 500 700 1000 1200
Surviving bare trees (m) 182 448 638 895 1084
Survival rate (m) 0.910 0.896 0.912 0.895 0.903
Based on the statistics, estimate the survival rate of the planted seedlings (rounded to 0.1) and calculate the approximate number of peach seedlings that successfully survived, given that 20,000 peach seedlings were planted during Arbor Day. The approximate number of successfully surviving peach seedlings is ________ (in tens of thousands). | 1.8 | NULL | free_form |
stat999 | /home/yz979/scratch/chengye/math/data/original_set/statset/images/images/999.png | A box contains several black and white chess pieces, which are indistinguishable apart from their colors. A student conducts an experiment by repeatedly drawing a piece from the box, recording its color, and then placing it back into the box and mixing thoroughly. The following data is obtained from the experiment: Based on the data in the table, estimate the probability of drawing a black chess piece from the box (accurate to 0.01). | 0.25 | NULL | free_form |
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